Method and apparatus for controlling and/or limiting speed excess by drivers

摘要

Normally, speed control is carried out by police using radar and camera. The speed of a car can also be recorded in a tachograph. According to the invention car speed is controlled and/or limited using driver-specific smart-cards and millimeter wave communications. When a car (13) enters the sector of a new transmitter (11), its card reader receives a signal telling the reader to consider the time information (t1) received from the transmitter as a starting time. When the car exits this first sector and penetrates the perimeter of a second transmitter (12), the reader receives over the air a second time information (t2) and other information (v1, d1) from which the speed is calculated and recorded within the card reader. The police can check the recorded information by inserting a special card into the reader.